The so called burn test is not always accurate thread made before 1950's suspose not to have the nylon or some chemical that will melt. Problem is there was a maker of SS and other rare insignia in Austria in the 1970 &80's that made all of them with ww2 or late 40 's thread so it passed the burn test all of the insignia he made was made 70 80's before he was caught and charged with fraud. I had some of it I bought thinking it was OK and it passed the "Burn test " of the threads on it. Another case in point was a mid western dealer I won't name he is deceased now who bought up a bunch of thread and material from the 1930's and made WW1 patches some of which were hard to find units my collector friend bought a bunch of it and got burned His operation was not exposed until a worker for him confessed to it. So buyer beware. timothy
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